Nona-D-arginine amide for prophylaxis and treatment of experimental Pseudomonas aeruginosa keratitis.

Abstract:

PURPOSE:Nona-D-arginine amide (D9R) affected a cure of Pseudomonas aeruginosa corneal disease when combined with ciprofloxacin. In this study, we show that D9R alone and prophylactic treatment with D9R significantly reduced corneal pathology and bacterial burden associated with P. aeruginosa infection. MATERIALS AND METHODS:Right eyes of Swiss Black mice received a 5 microl drop of either phosphate buffered saline (PBS, pH 7.4) or100 microM D9R every half-hour or hourly for 5 hr (total of 6-12 drops/eye) immediately after corneal wounding and subsequent infection with 1 x 10(6) colony forming units (CFU) of a cytotoxic strain of P. aeruginosa (ATCC 19660). For prophylactic treatment, eyes were treated hourly for 5 hr (total of 6 drops/eye) before infection with an invasive strain of P. aeruginosa (PAO1). At 24 hr post infection, all eyes were evaluated for pathology and scored on a scale of 0 (normal eye) to +4 (corneal perforation). Mice were then sacrificed and eyes were harvested for CFU determination (N = 15) or histopathology (N = 5). RESULTS:P. aeruginosa-infected eyes treated with prophylactic D9R or with D9R after infection had significantly less ocular pathology (P < or = 0.001) and bacterial burden (P < or = 0.01) than eyes treated with PBS. CONCLUSIONS:D9R (100 microM) would be a beneficial addition to current antimicrobial therapy for P. aeruginosa corneal disease. Furthermore, D9R can be incorporated into ophthalmic solutions as a prophylactic agent with the potential of reducing the incidence and severity of P. aeruginosa ocular infection.

journal_name

Curr Eye Res

journal_title

Current eye research

authors

Karicherla P,Hobden JA

doi

10.3109/02713680903487609

subject

Has Abstract

pub_date

2010-03-01 00:00:00

pages

220-4

issue

3

eissn

0271-3683

issn

1460-2202

journal_volume

35

pub_type

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